1172181313 has 8 divisors (see below), whose sum is σ = 1183766760. Its totient is φ = 1160611200.

The previous prime is 1172181287. The next prime is 1172181341. The reversal of 1172181313 is 3131812711.

It can be written as a sum of positive squares in 4 ways, for example, as 283024 + 1171898289 = 532^2 + 34233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172181313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172181113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204381 + ... + 210037.

It is an arithmetic number, because the mean of its divisors is an integer number (147970845).

Almost surely, 2^1172181313 is an apocalyptic number.

It is an amenable number.

1172181313 is a deficient number, since it is larger than the sum of its proper divisors (11585447).

1172181313 is a wasteful number, since it uses less digits than its factorization.

1172181313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7667.

The product of its digits is 1008, while the sum is 28.

The square root of 1172181313 is about 34237.1335394773. The cubic root of 1172181313 is about 1054.3826829634.

The spelling of 1172181313 in words is "one billion, one hundred seventy-two million, one hundred eighty-one thousand, three hundred thirteen".